title: Enhancement of anaerobic ammonium oxidation in lake sediment by applying drinking water treatment residuals.
abstract: In this study, the effect of drinking water treatment residuals (WTRs), non-hazardous byproducts from drinking water treatment plants, on anaerobic ammonium oxidation (anammox) in lake sediments were investigated, qualitatively and quantitatively based on enrichment tests. The results suggested that after the enrichment, anammox were strengthened significantly in enriched sediments with no WTRs (ESNW) and with WTRs (ESW). Comparatively, anammox bacteria in ESW were more aggregated than ESNW. The activity (9.2 nmol g(-1)h(-1)) and abundance (9.8×10(7)copies g(-1)) of anammox bacteria in ESW were also higher than ESNW (6.1 nmol g(-1)h(-1)and 8.9×10(7) copies g(-1)). Further analysis suggested that after enrichment, anammox bacteria in sediments were phylogenetically more distant from Candidatus Kuenenia; anammox bacteria in ESW were closely related to Candidatus Brocadia. Overall, WTRs promoted aggregation, strengthened activity and increased abundance of anammox bacteria in lake sediments. Therefore, WTRs can enhance anammox in lake sediments.
authors.affiliation: The Key Laboratory of Water and Sediment Sciences, Ministry of Education, School of Environment, Beijing Normal University, Beijing 100875, PR China.
authors.forename: Ziyuan
authors.initials: Z
authors.lastname: Wang
authors.forename: Changhui
authors.initials: C
authors.lastname: Wang
authors.forename: Zhixin
authors.initials: Z
authors.lastname: Wang
authors.forename: Yuansheng
authors.initials: Y
authors.lastname: Pei
mesh_terms: D064751:Ammonium Compounds / Q000378:metabolism*; D000693:Anaerobiosis; D060766:Drinking Water; D019015:Geologic Sediments / Q000382:microbiology*; D060106:Lakes; D010084:Oxidation-Reduction; D014871:Water Microbiology
chemical_list: D064751:Ammonium Compounds; D060766:Drinking Water
keywords: Anammox; Drinking water treatment residuals; Lake sediment; Nitrogen removal; Restoration